Re: [Hipsec] Segmentation within HIP
Robert Moskowitz <rgm@htt-consult.com> Tue, 29 March 2016 00:46 UTC
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References: <20160325224921.GA75376@cowbell.employees.org>
From: Robert Moskowitz <rgm@htt-consult.com>
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Date: Mon, 28 Mar 2016 20:46:09 -0400
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Subject: Re: [Hipsec] Segmentation within HIP
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Please see: draft-hares-i2nsf-ssls-00-02.txt Sue Hares and I are working on a whole session layer architecture where chunking and frag/reassem are parts of the session layer. The work we are doing there, definitely would easily apply to HIP. Actually you need more that a bit. Really 7 (this is what I did in IEEE 802.15.9), but 6 work. I would be interested in sitting down with you at IETF on this. This week I am busy with my youngest son's wedding (tomorrow night). On 03/25/2016 06:49 PM, Derek Fawcus wrote: > Recently I've been working on middlebox s/w: Firewalls and NAT. > > One thing this has brought home to me is just how unreliable > fragmentation is on the current Internet. NAT will often > simply break it (such that they can not be reassembled) or > just discard them, and firewalls are often set up to block them. > > As such, almost every protocol now would seem to need protocol > level segmentation/fragmentation, rather than depend up IP > level fragmentation. > > It struck me that it should be quite simple to extend HIP to > support such. > > 1) Add a Controls bit which advertises that the sender supports > segmentation. > 2) Define a new parameter, numbered 1 such that it is first in > the parameters, and is critical. > Within the parameter have a seqno/identifier, offset and > more segments / final segment bit, possibly also a total > size field. Define some simple reassembly rules, similar > to those for IP fragments, such that one could reassemble > a HIP packet larger than 2008 bytes if desired (how big?). > 3) Possibly also define a none critical parameter within the > non signed, non MACed range which advertises the max size > packet the sender is willing to reassemble. In fact I guess > this might remove the need to use a Controls bit, since it > would imply the sender can reassemble. > > Then have a rule that once one party has seen the other party > advertise the segmentation capability within the current BEX > session, it is free to make use of segmentation towards that peer. > > Thoughts? > > DF > > _______________________________________________ > Hipsec mailing list > Hipsec@ietf.org > https://www.ietf.org/mailman/listinfo/hipsec >
- [Hipsec] Segmentation within HIP Derek Fawcus
- Re: [Hipsec] Segmentation within HIP Tom Henderson
- Re: [Hipsec] Segmentation within HIP Robert Moskowitz
- Re: [Hipsec] Segmentation within HIP Robert Moskowitz
- Re: [Hipsec] Segmentation within HIP Derek Fawcus
- Re: [Hipsec] Segmentation within HIP Miika Komu
- Re: [Hipsec] Segmentation within HIP Robert Moskowitz
- Re: [Hipsec] Segmentation within HIP Robert Moskowitz
- Re: [Hipsec] Segmentation within HIP Gonzalo Camarillo
- Re: [Hipsec] Segmentation within HIP Robert Moskowitz